Oracle 11g provides different types of data compression techniques. Compression is the option to achieve the data compression in data pump. There are 4 options available with compression parameter.

ALL: Both metadata and data are compressed.

DATA_ONLY: Only data is compressed.

METADATA_ONLY: Only metadata is compressed. This is the default setting.

NONE: Nothing is compressed

In Oracle 10g data pump, there is no data compression option; only METADATA compression available with 10g. In Oracle 11g we don’t need to use UNIX compression options as it is available with data pump itself.